Dr. Thomas has found that William, her patient, has a defect in a gene on the X chromosome of his 23rd pair, which has resulted in a deficiency of a protein needed for William's brain development. William most likely suffers from

Protanopia and deuteranopia have in common that they both

a. result from a loss of blue cones. b. are defects in which yellow and blue colors are confused. c. are defects in which red and green colors are confused. d. result from a lack of yellow pigment. e. result from a lack of any rod photoreceptor.

Which of these bits of advice would be consistent with Bryan & Harter's work

with the learning of Morse code? (a) don't sweat the small stuff (b) work first on the BIG PICTURE (c) make lower order skills into automatic habits (d) take advantage of prepared learning